Merging updates from the original repo

CONTRIBUTING.md

@@ -0,0 +1,13 @@
+# How to contribute
+
+1) Pick or create some issues and assign them to yourself
+2) Create a feature branch
+3) Commit documented changes along with unit tests
+4) Create a Pull request
+
+
+Contribution is welcome on any aspect of the project but the following points are the priority:
+* Better documentation: Fill up missing public methods documentation headers, find a way to easily export it and host it in github
+* Better error messages: End user should understand why an exception is raised (e.g. wrong input shape)
+* Make the api less verbose (e.g. volume creation is ugly: ```BuilderInstance.Volume.From(new[] { 0.3, -0.5 }, new Shape(2))```)
+* Optimization of ConvNetSharp.Flow computation graph (factorization, simple optimization like replace X * 1 by X, ...)

ConvNetSharp.Nuget.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26430.14
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29728.190
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConvNetSharp.Volume", "src\ConvNetSharp.Volume\ConvNetSharp.Volume.csproj", "{1A285120-F2F0-4A94-AB31-B4E870679C0E}"
 EndProject
@@ -37,4 +37,7 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {BFC0BE6B-5893-480C-A89A-F9F8597E8265}
+	EndGlobalSection
 EndGlobal